Insert 50 objects in CoreData Table - ios

Question

I want to insert 50 values in coredata ta
Question.h
#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>
#interface Question : NSManagedObject
#property (nonatomic, retain) NSString * question;
#property (nonatomic, retain) NSString * answer;
#property (nonatomic, retain) NSString * mcqsa;
#property (nonatomic, retain) NSString * mcqsb;
#property (nonatomic, retain) NSString * mcqsc;
#property (nonatomic, retain) NSString * mcqsd;
Question.m
#import "Question.h"
#implementation Question
#dynamic question;
#dynamic answer;
#dynamic mcqsa;
#dynamic mcqsb;
#dynamic mcqsc;
#dynamic mcqsd;
#end
Insert Code
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSManagedObjectContext *context = [self managedObjectContext];
Question *question = [NSEntityDescription
insertNewObjectForEntityForName:#"Question"
inManagedObjectContext:context];
question.question = #"What is capital of Australia?";
question.answer = #"Testville";
question.mcqsa = #"Sydney";
question.mcqsb = #"Canbera";
question.mcqsc = #"Berlin";
question.mcqsd = #"Bern";
NSError *error;
if (![context save:&error]) {
NSLog(#"Whoops, couldn't save: %#", [error localizedDescription]);
}
.......
How can I insert multiple data, 50 questions with their mcqs (50 Question object)?
Is there any manual way using something else?

Answer 1

MagicalRecord a wrapper for CoreData provides some nice import features. You need to include the data that you need to import as plist/json in the bundle.
On the initial run you import data to coreData.
You can find a great tutorial on the same in the following link Importing data made easy
You need to create subclasses of NSManagedObject
on them you can call importFromObject: or importFromObject:. If you have full control over the structuring of the data this will happen out of the box without writing a single code for mapping data stored to core data entities.

Answer 2

You need a seed store, Pre-fill core data database then fetch it from device or simulator document directory and than add it to your bundle. At first run, you would copy database from bundle to Document directory and use that database onwards

Answer 3

You can use for loop to insert data.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
for(i=0; i<50; i++) {
NSManagedObjectContext *context = [self managedObjectContext];
Question *question = [NSEntityDescription
insertNewObjectForEntityForName:#"Question"
inManagedObjectContext:context];
question.question = #"What is capital of Australia?";
question.answer = #"Testville";
question.mcqsa = #"Sydney";
question.mcqsb = #"Canbera";
question.mcqsc = #"Berlin";
question.mcqsd = #"Bern";
NSError *error;
if (![context save:&error]) {
NSLog(#"Whoops, couldn't save: %#", [error localizedDescription]);
}
.......
}

Answer 4

Here is the code:
NSString* plistPath = [[NSBundle mainBundle] pathForResource:#"QuesList" ofType:#"plist"];
NSArray *quesList = [[NSArray alloc]initWithContentsOfFile:plistPath];
for(NSDictionary *object in quesList){
NSString *str1 = [object objectForKey:#"question"];
NSString *str2 = [object objectForKey:#"answer"];
NSString *str3 = [object objectForKey:#"mcqsa"];
NSString *str4 = [object objectForKey:#"mcqsb"];
NSString *str5 = [object objectForKey:#"mcqsc"];
Question *question = [NSEntityDescription
insertNewObjectForEntityForName:#"Question"
inManagedObjectContext:context];
question.question = str1;
question.answer =str2;
question.mcqsa =str3;
question.mcqsb =str4;
question.mcqsc = str5;
}
And
Also make sure that you run this code only once, otherwise it woudld create duplicate objects